What should be the thickness of quarter-wave plate for a light of wave – McqOptions

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1.	What should be the thickness of quarter-wave plate for a light of wavelength 5000 if _e = 1.553 and _o = 1.544?
A.	1.38 X 10<sup>-3</sup> cm
B.	1.43 X 10<sup>-3</sup>cm
C.	1.53 X 10<sup>-3</sup>cm
D.	1.63 X 10<sup>-3</sup> cm
Answer» B. 1.43 X 10<sup>-3</sup>cm

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